The Government Says

Referendums Relating to Council Tax Increases (Principles) (England) Report 2026 to 2027: draft

Referendums Relating to Council Tax Increases (Principles) (England) Report 2026 to 2027: draft
Local copy of Draft_Council_Tax_Referendum_Principles_Report_2026-27.pdf

https://www.gov.uk/government/publications/referendums-relating-to-council-tax-increases-principles-england-report-2026-to-2027-draft

seen at 16:44, 17 December in Policy papers and consultations.